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Flow Assessment on the Effects of Water Droplets on Rotor Region of Wet Compression

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Abstract:

Wet compression process has been widely accepted as a measure of increasing the performance of industrial gas turbine, in the present work, in-depth analysis on the principle aspects of wet compression, more specifically, the influence of injected water droplets diameter, surface temperature, and their effects on the behavior of axial flow transonic compressor and gas turbine performance were analyzed using computational fluid dynamic. Injected water droplets and gas flow phase change was most intense in the area adjacent to shockwaves and were the slip velocity of the droplet is highest. Water injection in to the compressor rotor is a little perturbation to the flow field due to the formation of flow separation, evaporation rate, increasing weber number, reduction in the inlet temperature, and velocity vortex pattern relatively different from that of the dry case. The effects of water droplets on the rotor region at injection rate of 1%, shows decrease in the inlet temperature of 11%, outlet temperature 5% and uplift the efficiency to 1.5%.

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Periodical:

Defect and Diffusion Forum (Volume 374)

Pages:

131-147

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.374.131

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Online since:

April 2017

Authors:

Gambo Kofar Bai Dayyabu*, Hai Zhang, Qun Zheng, Salman Abdu

Keywords:

Flow Separation, Gas Turbine, Inlet Temperature, Transonic Compressor, Water Droplet

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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